what is the functions of fluorescent powder in fluorescent lamp
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The actual gas in a fluoroescent lamp is charged by electric current to form a plasma, the fourth state of matter and results in the plasma releasing energy in the form of photons with the frequency of ultraviolet (UV) light. (The photon is considered both a particle and a wave. Difficult to explain. A particle then can have mass, which is interchangeable with energy (E=MC^2). The “wave” frequency of the photon its energy. The greater the energy the photon represents, the higher its wave frequency. UV light photons have a bit more energy than the colors in our visible spectrum.
The UV photons bombard the atoms of the fluorescent material coating the inside of a fluorescent tube, exciting their electrons into higher, quantum-defined orbits. The arrival of energetic UV photons is not consistent at each atom in the tube so excited electrons of the atoms of fluoroescent material must then return to their less excited levels. They do so instantaeously by releasing a photon of specific energy. The result of that “quantum leap” of an electron to its lower energy state results in a phton with a wave frequency proprtional to the enrgy it released. Ther eare many electron energy levels around the atoms of the mix of fluoroescent material. What we see is a full white spectrum of photon frequencies as the result.
The chemical makup of the fluoroscent material defines the possible color spectrum achieved by the quantum activity of the electrons of the atoms in the mix. In this way the “color temperature” of the fluoroescent light is controlled.
The actual gas in a fluoroescent lamp is charged by electric current to form a plasma, the fourth state of matter and results in the plasma releasing energy in the form of photons with the frequency of ultraviolet (UV) light. (The photon is considered both a particle and a wave. Difficult to explain. A particle then can have mass, which is interchangeable with energy (E=MC^2). The “wave” frequency of the photon its energy. The greater the energy the photon represents, the higher its wave frequency. UV light photons have a bit more energy than the colors in our visible spectrum.
The UV photons bombard the atoms of the fluorescent material coating the inside of a fluorescent tube, exciting their electrons into higher, quantum-defined orbits. The arrival of energetic UV photons is not consistent at each atom in the tube so excited electrons of the atoms of fluoroescent material must then return to their less excited levels. They do so instantaeously by releasing a photon of specific energy. The result of that “quantum leap” of an electron to its lower energy state results in a phton with a wave frequency proprtional to the enrgy it released. Ther eare many electron energy levels around the atoms of the mix of fluoroescent material. What we see is a full white spectrum of photon frequencies as the result.
The chemical makup of the fluoroscent material defines the possible color spectrum achieved by the quantum activity of the electrons of the atoms in the mix. In this way the “color temperature” of the fluoroescent light is controlled.
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A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow. A fluorescent lamp converts electrical energy into useful light much more efficiently than incandescent lamps. The typical luminous efficacy of fluorescent lighting systems is 50–100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output.
Fluorescent lamp fixtures are more costly than incandescent lamps because they require a ballast to regulate the current through the lamp, but the lower energy cost typically offsets the higher initial cost. Compact fluorescent lamps are now available in the same popular sizes as incandescents and are used as an energy-saving alternative in homes.
Because they contain mercury, many fluorescent lamps are classified as hazardous waste. The United States Environmental Protection Agency recommends that fluorescent lamps be segregated from general waste for recycling or safe disposal, and some jurisdictions require recycling of them.
Fluorescent lamp fixtures are more costly than incandescent lamps because they require a ballast to regulate the current through the lamp, but the lower energy cost typically offsets the higher initial cost. Compact fluorescent lamps are now available in the same popular sizes as incandescents and are used as an energy-saving alternative in homes.
Because they contain mercury, many fluorescent lamps are classified as hazardous waste. The United States Environmental Protection Agency recommends that fluorescent lamps be segregated from general waste for recycling or safe disposal, and some jurisdictions require recycling of them.
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